Fusion hindrance of heavy ions: Role of the neck
Fusion hindrance of heavy ions: Role of the neck
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DOI：
10.1103/physrevc.84.054608
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发表时间：
2011-11
影响因子：
3.1
通讯作者：
D. Boilley;Hongliang L¨u;Caiwan Shen;Y. Abe;Bertrand G. Giraud
中科院分区：
文献类型：
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作者：
D. Boilley;Hongliang L¨u;Caiwan Shen;Y. Abe;Bertrand G. Giraud
由于在两个碰撞核的接触点和复合核之间出现了一个内势垒，重离子的聚变在很大程度上受到了阻碍。但是，在势垒的大小和耗散的作用上，仍然存在定量的模糊性。本文强调了复合系统的颈对重核熔合的阻碍作用。我们表明，“denecking”的过程是非常快的相比，其他集体自由度的相对距离。颈部的这种行为将通过动力学耦合来改变由熔合过程中的相对距离所看到的电势及其有效初始值。这两种效应都对聚变的阻碍起作用
Fusion of heavy ions is largely hindered because of the appearance of an inner barrier between the contact point of the two colliding nuclei and the compound nucleus. But there are still quantitative ambiguities on the size of the barrier and on the role of the dissipation. In this paper we stress the importance of the neck of the composite system on the hindrance of the fusion of heavy nuclei. We show that the “denecking” process is very quick compared to the other collective degrees of freedom as the relative distance. This behavior of the neck will change the potential seen by the relative distance on the way to fusion and its effective initial value through a dynamical coupling. Both effects contribute to the hindrance of fusion